title: [Psoas abscess associated with hip arthroplasty infection].
abstract: BACKGROUND
  Psoas abscess associated with hip arthroplasty infection is a rare entity. The aim of this report was to review our experience.
  
  
  METHODS
  Patients with computerized tomography (CT) diagnosis of psoas abscess associated with a hip arthroplasty infection from 2004 to 2009 were retrospectively reviewed. Demographics, microbiological data, CT results and outcome of each patient were recorded.
  
  
  RESULTS
  Seven patients out of 214 evaluated by CT due to hip infection suspected were identified. Three women and 4 men, with a mean age of 69 years (range 46-89). Mean abscess diameter was of 62 x 47 mm. In all cases, a direct communication between abscess and prosthesis was observed. The most commonly isolated microorganisms were grampositive cocci. All patients were treated with two-stage revision surgery. After a mean follow-up of 65 months (28-113), six patients were in remission.
  
  
  CONCLUSIONS
  The use of CT in the study of suspected infection of a hip arthroplasty identified a psoas abscess in 7 cases out of 214 evaluated. Patients treated with two-stage revision surgery and large debridement was associated with a good clinical outcome.
authors.affiliation: Ibon López Zabala, Servicio de Cirugía Ortopédica y Traumatología, Instituto Clinic de Especialidades Médico-Quirúrgicas (ICEMEQ), Hospital Clínic. Universitat de Barcelona, C/ Villarroel 170. 08036 Barcelona, Spain. lopez.ibon@gmail.com.
authors.forename: Ibon
authors.initials: I
authors.lastname: López-Zabala
authors.forename: Sebastián
authors.initials: S
authors.lastname: García-Ramiro
authors.forename: Guillem
authors.initials: G
authors.lastname: Bori
authors.forename: Xavier
authors.initials: X
authors.lastname: Gallart
authors.forename: Xavier
authors.initials: X
authors.lastname: Tomás
authors.forename: David
authors.initials: D
authors.lastname: Fuster
authors.forename: Josep
authors.initials: J
authors.lastname: Mensa
authors.forename: Alex
authors.initials: A
authors.lastname: Soriano
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip; D018450:Disease Progression; D005260:Female; D005500:Follow-Up Studies; D016908:Gram-Positive Bacterial Infections / Q000382:microbiology; D006095:Gram-Positive Cocci; D006801:Humans; D008297:Male; D008875:Middle Aged; D016133:Polymerase Chain Reaction; D049268:Positron-Emission Tomography; D011183:Postoperative Complications / Q000000981:diagnostic imaging / Q000382:microbiology / Q000601:surgery*; D016459:Prosthesis-Related Infections / Q000000981:diagnostic imaging / Q000382:microbiology / Q000601:surgery*; D016659:Psoas Abscess / Q000209:etiology / Q000382:microbiology / Q000601:surgery*; D019275:Radiopharmaceuticals; D012086:Reoperation; D019690:Technetium Tc 99m Exametazime
chemical_list: D019275:Radiopharmaceuticals; D019690:Technetium Tc 99m Exametazime